So they have dropped two launches? Blok 48S and 49? And 47 has become a solo launch 47S.

Also to note that one reason for the GLONASS-K was that they could be launched on smaller rockets; two on a Soyuz or six on a Proton. However Soyuz carries just one and the above indicates just three are to be carried by each Proton.

One of my fav. topics which I'm following it since I was in my UG Electrical Engineering school (1990-94). I learned a lot once I moved to the US. Here's the GLONASS status URL which I regularly follow:

Procured products & services:-[tender] [contract] Delivery of a Soyuz-2-1B rocket to the launch site[tender] [contract] Delivery of a Fregat upper stage with a fairing to the launch site[tender] [contract] Soyuz-2-1B launch campaign

March 2013

Block

Start

Typeof launch

Productionof rocket

Productionof upper stage

Productionof fairing

Transportationof rocket

Transportationof upper stage

Transportationof GLONASS

Launchcampaign

47S

26.04.2013

Soyuz 1×M

2013

2013

2013

05.2012 - 12.2013

48

28.06.2013

Proton 3×M

2013

05.2012 - 12.2013

K2S

2013

Soyuz 1×K

50S

2013

Soyuz 1×M

2013/IV

2013/IV

2013/IV

52S

2014

Soyuz 1×M

2014/I

2014/I

2014/I

53S

2014

Soyuz 1×M

2014/II

2014/II

K3S

2014

Soyuz 1×K

2014/III

2014/III

54

2014

Proton 3×M

30.06.2014

2014

K5

2015

Proton

2015

2015

Procured products & services:-[tender] [contract] Production of a Proton-M rocket[tender] [contract] Production of DM-03 upper stage[tender] [contract] Production of an 813ГЛН34 fairing

December 2013

Block

Start

Typeof launch

Productionof rocket

Productionof upper stage

Productionof fairing

Transportationof rocket

Transportationof upper stage

Transportationof GLONASS

Launchcampaign

50S 48S

2013

Soyuz 1×M

2013/IV

2013/IV

2013/IV

2014

2014

2013 - 2014

52S 49S

2014

Soyuz 1×M

2014/I

2014/I

2014/I

2014

2014

2014

54 50

2014

Proton 3×M

30.06.2014

2014

2013 - 2014

2014

K2S

2014

Soyuz 1×K

K5 51

2015

Proton 3×M

2015

2015

2015

53S 52S

2015

Soyuz 1×M

2014/II

2014/II

2015

2015

K3S 53S

2015

Soyuz 1×M

2014/III

2014/III

2015

2015

54S

2015

Soyuz 1×M

2015

2015

Soyuz

2016

2016

Soyuz

2016

2016

Procured products & services:-[tender] [contract] Proton-M launch campaign[tender] [contract] Production of three Soyuz-2-1B rockets[tender] [contract] Delivery of GLONASS to the launch site[tender] [contract] Production of five 14С737 fairings[tender] [contract] Production of a Briz-M upper stage[tender] [contract] Delivery of two Fregat upper stages with fairings to the launch site[tender] [contract] Delivery of two Soyuz-2-1B rockets to the launch site

The previously ordered DM-03 for 2015 does not appear to have lead to a contract. Instead there is a contract for a Briz-M

Procured products & services:-[tender] [contract] Soyuz-2-1B launch campaign[tender] [contract] Production of an 813ГЛН34 fairing[tender] [contract] Production of three Proton-M rockets[tender] [contract] Production of three Fregat upper stages[tender] [contract] Soyuz-2-1B launch campaign[tender] [contract] Soyuz-2-1B launch campaign[tender] [contract] Transportation of DM-03 from Energia to Khrunichev, for onward transportation along with Proton-M to the launch site

Further confusing the 2015 Proton-M upper stage choice is the ordering of a fairing for a DM type.

According to the Glonass article from Wikipedia, all Glonass-M satellites will be deployed by the end of 2017, which will be followed by the launches of Glonass-K satellite until 2015; by then, Glonass-KM satellites will be launched, and those satellites will broadcast as many as 13 FDMA and CMDA signals (some of them are still in design phase...).

Production of navigation satellites GLONASS-M to be completed in 2015, after which there will only be a new generation of satellites - GLONASS-K, said the company’s CEO Nikolai Testoyedov of “Information Satellite Systems” in the name of Reshetnev (ISS, Zheleznogorsk).This year will produce five units, two in 2015, he said to “Interfax”. These units will be put into orbit by the middle of 2016. Only then will production begin on the new GLONASS-K.

The Glonass constellation has ended operations on two of the "inactive" satellites. One was listed as a spare and the other as "under check by the SPC" until august 28.

Glonass coverage will be sub-optimal at least until the sat that will launch on september 22 become active... And then, there will be no spares. Note that at year's end, 6 of the 23-24 active sats will be older than 10 years.

In-demand launch is maybe the appropriate term, but not necessarely the fastest system to cover the constellation capability. Coverage is 23/24 sats since early july, launch will happend end of september and service about a month later.

Why is the constellation kept with no on-orbit spares (which will prompt some level of disruption to the service every time a sat fails)? Is the disruption too small to be of importance and preferable to having unneeded sats degrading in space? Or is it just a cash problem? Maybe some twisted political issue?

Sept. 22: A Soyuz-2-1b/Fregat-M rocket to launch the GLONASS-M No. 52 satellite from Plesetsk for Russia's global satellite navigation network, GLONASS. The spacecraft was built by ISS Reshetnev based in Zheleznogorsk, Russia, more than two years prior its launch and put in storage to serve as a spare vehicle. The launch of GLONASS-M No. 52 was earlier planned for Sept. 6, 2017, but in July 2017, it was postponed to Sept. 22 of the same year. On Aug. 25, 2017, ISS Reshetnev announced that GLONASS M No. 52 had been air-shipped to Plesetsk aboard an Il-76 transport plane. At the time, the company still had six GLONASS-M satellites in stand-by mode on the ground for the replenishment of the GLONASS constellation on the "as-needed" basis.

There are two contracts for the delivery of three rockets in 2017: №353-С387/16/70 and №353-С365/17/41. It is the 2nd contract that has a document accepting Soyuz-2.1b №У15000-039 has been delivered, dated September 2017. That detail is not yet provided for the 1st contract.

There are two contracts for the delivery of three rockets in 2017: №353-С387/16/70 and №353-С365/17/41. It is the 2nd contract that has a document accepting Soyuz-2.1b №У15000-039 has been delivered, dated September 2017. That detail is not yet provided for the 1st contract.

Think I understand. At that point there was seven GLONASS-M remaining.

That contract was signed in December 2017, item 1 covered the shipment of the final GLONASS-M to Plesetsk.

There is a contract still open for the ones before.

In December 2013 a contract was placed for the shipment of GLONASS-M satellites to the launch sites.http://www.zakupki.gov.ru/epz/contract/contractCard/common-info.html?reestrNumber=0173100007013000367The contract shows six deliveries:-1. Single GLONASS-M to Plesetsk, scheduled 2013-2014, 10,345,000 ruble2. Single GLONASS-M to Plesetsk, scheduled 2014, 11,029,900 ruble3. Three GLONASS-M to Baikonur, scheduled 2013-2014, 30,731,100 ruble4. Single GLONASS-M to Plesetsk, scheduled 2014-2015, 11,614,600 ruble5. Single GLONASS-M to Plesetsk, scheduled 2014-2015, 11,614,600 ruble6. Three GLONASS-M to Baikonur, scheduled 2014-2015, 32,360,400 ruble

Items 1 and 2 were completed in 2014. So I think those would be Kosmos-2494 launched in March 2014, and Kosmos-2500 launched June 2014?

In December 2014 the contract was amended. Item 3 was pushed out to 2015.3. Three GLONASS-M to Baikonur, scheduled 2013-2015, 30,731,100 ruble4. Single GLONASS-M to Plesetsk, scheduled 2014-2015, 11,614,600 ruble5. Single GLONASS-M to Plesetsk, scheduled 2014-2015, 11,614,600 ruble6. Three GLONASS-M to Baikonur, scheduled 2014-2015, 32,360,400 ruble

Item 4 was completed in 2015. Kosmos-2514 launched in February 2016?

In November 2015 the contract was further amended. All remaining dates were pushed out to 2016.3. Three GLONASS-M to Baikonur, scheduled 2013-2016, 30,731,100 ruble5. Single GLONASS-M to Plesetsk, scheduled 2014-2016, 11,614,600 ruble6. Three GLONASS-M to Baikonur, scheduled 2014-2016, 32,360,400 ruble

Item 5 was completed in 2016. Kosmos-2516 launched in May 2016?

In December 2016 one Baikonur group was split into three single launches. All dates pushed out another year.3.1 Single GLONASS-M to Plesetsk, scheduled 2013-2017, 10,243,700 ruble3.2 Single GLONASS-M to Plesetsk, scheduled 2013-2017, 10,243,700 ruble3.3 Single GLONASS-M to Plesetsk, scheduled 2013-2017, 10,243,700 ruble6. Three GLONASS-M to Baikonur, scheduled 2014-2017, 32,360,400 ruble

Item 3.1 was completed in 2017. Kosmos-2522 launched in September 2017?

In December 2017, all dates pushed out again.3.2 Single GLONASS-M to Plesetsk, scheduled 2013-2018, 10,243,700 ruble3.3 Single GLONASS-M to Plesetsk, scheduled 2013-2018, 10,243,700 ruble6. Three GLONASS-M to Baikonur, scheduled 2014-2018, 32,360,400 ruble